Rock Garden Plants
Penstemon humilis Nutt. ex A.Gray sect. Penstemon 
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FamilyPLANTAGINACEAE
Genus speciesPenstemon humilis Nutt. ex A.Gray sect. Penstemon
SynonymsPenstemon cinereus Piper
 Penstemon collinus A.Nelson
 Penstemon puberulus M.E.Jones
Habitatdry, rocky slopes
Altitude1000-3400m
Descriptionfinely cinereous, leaves entire, basal leaves persistent, lanceolate to ovate, to 12cm, stem leaves reduced, inflorescence verticillate, few flowered, flowers 10-17mm
Size5-40cm
Colordark blue
Bloomsummer
Ca
Typetuft
Cultivationsunny, dry, rock crevices, protection against winter wet
alpine house, poor, drained soil, sun
Propagationseed in spring, barely covered, germ. 1-3 months, 13-18°C
cuttings in late summer
Territory Northern America
     Northwestern U.S.A. (Colorado , Idaho , Montana , Oregon , Washington , Wyoming )
     Southwestern U.S.A. (California , Nevada , Utah)
BibliographyPlants of the World online powo.science.kew.org
International Plant Names Index www.ipni.org
Comments

PLANTAGINACEAE

Penstemon humilis Nutt. ex A.Gray, Proc. Amer. Acad. Arts 6: 69 (1862)

1500-3400m
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humilis typicus D.D.Keck, Amer. Midl. Naturalist 33: 182 (1945)

Synonyms:
Penstemon cinereus Piper
Penstemon cinereus foliatus D.D.Keck
Penstemon cinereus typicus D.D.Keck
Penstenon collinus A.Nelson
Penstemon decurvus Pennell ex Crosswh.
Penstemon humilis desereticus S.L.Welsh
Penstemon puberulus M.E.Jones

w. USA
73 COL IDA MNT ORE WAS WYO 76 CAL NEV UTA

1500-3400m

humilis brevifolius A.Gray, Syn. Fl. N. Amer. 2(1): 267 (1878)

Utah
76 UTA

humilis obtusifolius (Pennell) D.D.Keck, ibid.

Basionym:
Penstemon obtusifolius Pennell, Contr. U.S. Natl. Herb. 20: 370 (1920)

Utah (Washington Co.)
76 UTA

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